Mass Effect Play: Rule Changes

In the 3E GURPS Mass Effect Game that we play every other week our GM made the following rule Changes:

Rule Changes: All pistols and assault rifles now only roll for one shot; if there is no aim and the shot just hits then it is a "Grazing Shot". Accuracy of the weapon now dictates the damage multiplier. Critical hits are now only on a 3 or 4 though the better you make the shot the higher the multiplier. No bonus for HUD or laser targeting (essentially, they are a wash when making a snapshot.)
No called Shots.

The change was instituted to speed up combat (Assault Rifles with 3 shots takes a long time to resolve).

This should have no effect on the Sniper, even though he won't be making "Critical Hits" as often, He will still be making kills (as he will almost always hit with a 10 or better getting a massive multiplier).